Plumber&#39;s and tinner&#39;s portable furnace.



No. 890,189. PATENTED JUNE 9', 1908. I P. E. SNOW.

PLUMBERS AND TINNERS PORTABLE FURNACE.

APPLICATION rum) SEPT. 21,1901.

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PETER EJSNOW, OF DENVER, COLORADO, ASSIGNOR TO ADA E. SNOW, OF DENVER, COLORADO.

PLUMBERS AND TINNERS PORTABLE FURNACE.

T 0 all whom it may concern:

. Be it known that 1, PETER E. SNOW, of Denver, in the county of Denver and State of Colorado, have invented certain novel and useful Improvements in Plumbers and Tinners Portable Furnaces, of which the following is a full, clear, and. accurate description and specification, reference being had to the accompanying drawings, which. are hereby made a part thereof.

My invention relates to improvements in that class of portable furnaces in which the heating-chamber, composed of a grate, known as a top-plate, and a hood, is raised upon upright supporting posts over a burner-chamber and some distance above an oil-tank or reservoir.

The principal objects of my invention are :to provide a device which insures com.- plete and perfect combustion of all the gas generated from a given quantity of gasolene or other hydro-carbon oil consumed; to conserve and utilize to the highest degree the heat resultant from such combustion; and, generally, to improve the construction, efficiency and economy of this class of devices.

To accomplish these objects, my invention consists in certain novel features of construction of the several parts of the device, and in the arrangement and combination of those parts, as hereinafter described and set forth in the claims.

In the accompanying drawings, Figure 1 is a View as a whole of a furnace of the class in question, with my device in proper attachment upon the tops of the supporting posts. Fig. 2 is a vertical cross-section of the closed hood and plate detached from the rest of the furnace, and showing a meltingpot in place within the hood. Fig. 3 is a top view of the plate alone, and Fig. 4 is a bottom view of the same.

The same letters of reference indicate the same parts in the different views shown.

A. is an oil-tank or reservoir. B. is the oil-supply or feed pipe leading therefrom to the burner.

C. is a means by which air may be forced in to the reservoir to regulate and control the oil pressure.

D. D. are upright supporting posts raised upon the reservoir, and furnishing means for the attachment of my device.

E. is a perforated part, preferably cylindrical in form, which may be designated as Specification of Letters Patent.

Application filed September 21, 1907.

Patented June 9, 1908;

Serial No. 394,005.

the burner-chamber, and contains the vaporburner of the furnace.

F. represents, in my device, the grate or top-plate, of the furnace as a whole. It may conveniently be attached to the supporting posts by means of the tops of the posts passing through the holes a. in the lugs b. on the plate, the tops of the posts being threaded to receive nuts to make the attach ment secure. This plate F. is formed. with a hole a. in its center, as indicated. The cir cumference of this hole is not regular, but has inward projections, 0., which are continuations of cross-ribs f. in the upper surface of the plate. The plate is further constructed with a series of slotted-holes (1. arranged concentric with the central hole 0. These holes are preferably constructed wider at the lower surface of the plate than at the upper, thus presenting sides Hanging upwardly and toward each other, as indicated in Fig. 2. at d. and d. by the slanting lines, and again in Fig. 4. at d. d. etc. where the bounding edges of the tops of the holes are shown wholly within the corresponding bounding edges of the bottoms of the same holes. The burnerchamber E., which should. itself have an open top, is attached to the lower surface of the plate F. by any convenient means through the holes g. It will thus appear that the hole 0. in the plate will be directly over the top of the burner-chamber and the burner therein, and that the slotted-holes (1. will be outside of the circumference of the chamber.

G. are lugs provided on the edge of the plate for the attachment of the bail H. for convenience in carrying the furnace as a whole.

I. is the closed hood or heating-chamber of my device. The lower part of this hood is designed to fit snugly around the outer edges of the plate F., and the lower edge of the hood extends somewhat below the lower surface of the plate, as indicated in Figs. 1 and 2., the dotted lines in Fig. 1 indicating the position of the plate within the hood. This hood is formed of two parts, the body J. and a hinged-top K., the latter being in form a truncated cone surmounted by a low chimney L. K. should be lined with asbestos as indicated by R. The hinge of top K. is indicated at T. In the lower edge of K. is a hole N. covered when not in use by the hingedflap 0. This hole is designed to admit of soldering-irons or similar tools being placed within the hood to heat.

P. in Fig. 2 indicates an ordinary meltingpot in place within the hood and resting upon the plate F., as when the furnace is in use. Both irons and pot may be in the furnace hood at one time and be heated by the same heat, as the irons will rest upon the top, of-

the pot, and neither will interfere with the other.

The operation of the device, and the re sults obtained by it are thus described. When the burner is lighted, the flame of the burning gas from the oil passes up through hole 0. in plate F. into the heating-chamber or hood I. With a melting-pot in place within the hood as in Fig. 2, this burning gas will be deflected toward the sides of the hood, as indicated by sinuous lines. A draft is thus established which draws currents of air into the heating chamber through the slotted-holes d. and toward the chimney L. as indicated by the arrows in Fig. 1, which said air draft is still further aided and strengthened by the form of construction of the slotted holes wider at the bottom than at the top, and-by the construction of the lower edge of the hood extending some distance below the lower surface of the plate. Then withinthe hood the currents of air mix with the burning gas, and by a proper regulation of the oil-supply and air pressure, the combustion of the gas is made practically complete and. perfect. This result is still further aided by the form of the hood itself with its truncated conical hinged-top. This top serves to confine the gas and air together in the chamber and compel them to mix completely instead of passing off rapidly before becoming entirely mixed, as they would do, if the top of the heating chamber was open as in the ordinary furnace or if the sides of the hood were straight throughout their entire length and the whole covered by a flat top. This top also has the effect of confining and centralizing and thus intensifying the heat within the chamber by tending to deflect it down upon the melting-pot and contents, and so creating counter currents which not only facilitate the mixing of the air and gas as before mentioned, but also conserve and render efficient to the last degree the heat derived from the combustion of the oil. The asbestos lining of the top K. of the hood materially aids in the conservation and in tensifying of the heat within the chamber by preventing radiation. It will be found that this action of my device effects a very large saving of the quantity of oil consumed in a given period, and at the same time renders much more efficient the action of the furnace during that period.

No claims are made to any of the parts hereinbefore mentioned, except the topplate and hood constituting my device, save as they are required in combination with my device to form a complete furnace.

While I have shown throughout What I regard to be the preferable construction of my device, changes may be made within the scope of the invention without altering the principle involved.

Having described my invention, my claims are 1. In the construction of a plumbers or tinners furnace, a top-plate and a closed hood, in combination with a burner-chamber, a tank or reservoir constructed with and bearing upright supporting rods, and a carrying-bail; the top-plate being provided with a large central hole and having a series of slotted holes arranged around the said central hole, but at some distance from it, said plate being provided with means of attaching it to the tops of the said supporting rods raised upon the said reservoir of the furnace, and being further provided with means of attaching the said burner-chamber to the lower surface of the plate, and being also provided with means for attaching the said carrying-bail to carry the furnace as a whole; and the closed hood designed and constructed so that its lower edges will fit snugly about the outer edges of the said plate and extend some distance below its lower surface, this said hood being provided with a truncated conical hinged-top, surmounted by a low chimney, and having in one part of the lower edge of the hinged top a hole with hinged flap-cover, the said plate and hood together being designed and constructed to constitute a heating chamber wherein burning gases, by means of the draft induced by the low chimney and the series of slotted holes, will be thoroughly mixed with air and completely consumed, substantially as and for the purposes described.

2. In a plumbers or tinners furnace, the combination into a heating-chamber of a topplate and closed hood, together with a burnerchamber, a tank or reservoir con structed with and bearing upon its upper part upright supporting rods, the top-plate being fixed upon the tops of the said supporting rods, and being constructed with a large central hole and a series ofslotted-holes arranged at some distance from the said large central hole, and having the burnerchamber attached to the lower surface of the said plate, inclosing the said large central hole, but wholly within the line of the said series of slotted-holes; and the closed hood rising above the said top-plate and fitting down closely about the outer edges of the said. plate and extending well below its lower surface, this hood having a truncated conical hinged-top, surmounted by a low chimney, and the lower edge of the said hinged-top being provided in one part with a hole covered by a hingedflap, substantially as and r tinners furnaces, a top-plate and closed hood, together in combination with a burner chamber, a carrying-bail for the furnace as a whole, and a reservoir or tank constructed with and bearing upon its upper part upright supporting rods; the top-plate being provided with a large central aperture with irregularly formed edges consisting of elongations of parts of the edges out into the area of the aperture itself, and also with a series of slotted-holes wider at the lower surface of the plate than at the top, and arranged about the central aperture, but at some distance from it, said plate being further provided with means of attachment upon the tops of the said upright supporting rods borne upon the said reservoir or tank of the furnace, and being also provided with means of attaching the said burner-chamber to the lower surface of the plate itself so that the top of the said burner-chamber shall be directly below and inclose the large central aperture, but so that the outer edges of said burner-chamber are still well within the line of the series of slottedholes, and said plate being further provided with means of attaching the said. carryingbail for the furnace as a whole; and the closed hood being raised upon the said plate, with its lower edges fitting snugly to the edges of the plate and extending some distance below its lower surface, the said. hood being further provided with a truncated conical hingedtop, surmounted by a chimney, and having in one part of the lower edge of the said hinged-top a hole provided with a hinged flap-cover, the two said parts, the plate and the closed hood, together forming a heatingchamber, substantially as and for the purposes described.

4. In the construction of a plumbers and tinners furnace, a heating chamber, composed by a top-plate and a closed. hood, in construction and combination with a reservoir or tank constructed with and bearing upright supporting rods, and a carrying-bail for the furnace as a whole, and a burnerchamber; the top-plate having a large central hole with irregularly formed edges produced by elongations of parts of the said edges out into the area of the hole, and de signed to hold an ordinary melting-pot in place upon the plate, but without filling up or covering the entire area of the said. hole, said top-plate being further constructed with a series of slotted-holes arranged in the plate and piercing its entire body at some distance from and concentric with the said central hole, so that a considerable area of solid plate intervenes between the edges of the central hole and the edges of the slotted-holes, the said. plate also having a means of attachment to the tops of the said supporting rods borne upon the tank or reservoir, and also means of attachment for the said carrying-bail for the furnace as a whole, together with means of attachment for the said burner-chamber so that the latter may be placed and fixed below and flush with the lower surface of the said top-plate, to inclose the large central hole, but so as to leave the series of slottedholes without the burner-chamber; and the closed hood comprising two parts, a body and a truncated conical hinged-top, the lower edges of the body fitting snugly around the outer edges of the said top-plate and extending some distance below its lower surface, the said hinged-top being lined with asbestos, and surmounted by a low chimney, and having in one part of its lower edge a hole provided with a hinged flap-cover, substantially as and for the purposes described.

In testimony whereof I have hereunto set my hand in the presence of two witnesses.

PETER E. SNOW.

Witnesses:

WM. P. KAVANAGH O. A. WAKEMAN. 

